The Plain of Jars is an archaeological landscape in central Laos, located in the Xieng Khouang Plateau. The plain comprises thousands of stone jars scattered across the landscape, some weighing several tons. The jars date back to the Iron Age, between 500 BCE and 500 CE, and their purpose and creators remain a mystery to this day.

The jars come in various sizes, from small to giant, with the tallest measuring up to three meters in height. They are typically made of sandstone or granite and are thought to have been used for funerary purposes, possibly as containers for the remains of the deceased.

The Plain of Jars is divided into three main sites, with Site 1 being the largest and most visited by tourists. The sites are accessible by car, and visitors can hike or bike between them.

In addition to the jars themselves, the Plain of Jars is home to a number of other archaeological sites, including stone circles, ancient dwellings, and burial sites. The area is also known for its natural beauty, with rolling hills, lush forests, and meandering rivers.

The Plain of Jars was designated a UNESCO World Heritage Site in 2019, in recognition of its outstanding cultural and historical significance. However, the site has suffered damage from bombing during the Vietnam War and from looting, and efforts are underway to preserve and protect it for future generations.